MAYBE MAYBE TRS: {f(0(), 1(), X) -> f(g(X, X), X, X), g(X, Y) -> X, g(X, Y) -> Y} DUP: We consider a duplicating system. Trs: { f(0(), 1(), X) -> f(g(X, X), X, X), g(X, Y) -> X, g(X, Y) -> Y } Fail